fix:readme slack url

[karthik507]

Readme file update with new slack url , kindly update the new url.

[YTGhost]

@karthik507 The revised link is not the same as the one @rambohe-ch provided before?

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Comparison is base (3c3b3cb) 51.98% compared to head (2322cd0) 52.03%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #1945 +/- ## ========================================== + Coverage 51.98% 52.03% +0.04% ========================================== Files 174 174 Lines 21213 21213 ========================================== + Hits 11028 11038 +10 + Misses 9210 9201 -9 + Partials 975 974 -1 ``` | [Flag](https://app.codecov.io/gh/openyurtio/openyurt/pull/1945/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openyurtio) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/openyurtio/openyurt/pull/1945/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openyurtio) | `52.03% <ø> (+0.04%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=openyurtio#carryforward-flags-in-the-pull-request-comment) to find out more.

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[karthik507]

@karthik507 The revised link is not the same as the one @rambohe-ch provided before?

@YTGhost the link which you gave was working url :https://join.slack.com/t/openyurt/shared_invite/zt-2bptiyzuv-oDDlfdLwS0AuxSyD4cq4eA and @rambohe-ch url was different and that was also working ,i updated the url which you gave.

[YTGhost]

@karthik507 The revised link is not the same as the one @rambohe-ch provided before?

@YTGhost the link which you gave was working url :https://join.slack.com/t/openyurt/shared_invite/zt-2bptiyzuv-oDDlfdLwS0AuxSyD4cq4eA and @rambohe-ch url was different and that was also working ,i updated the url which you gave.

The URL I provided appears to expire, but @rambohe-ch gave does not. Please change it to the one he provided.

[karthik507]

@karthik507 The revised link is not the same as the one @rambohe-ch provided before?

@YTGhost the link which you gave was working url :https://join.slack.com/t/openyurt/shared_invite/zt-2bptiyzuv-oDDlfdLwS0AuxSyD4cq4eA and @rambohe-ch url was different and that was also working ,i updated the url which you gave.

The URL I provided appears to expire, but @rambohe-ch gave does not. Please change it to the one he provided.

@YTGhost okay

[sonarcloud[bot]]

Quality Gate passed

Kudos, no new issues were introduced!

0 New issues
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[rambohe-ch]

/lgtm

[rambohe-ch]

Fixes #1944